Questions tagged [hall-effect]
The Hall effect is a voltage arising from an electric field perpendicular to a magnetic field in a material. It is to be distinguished from the quantum hall effect (QHE).
60
questions
-1
votes
1
answer
180
views
How to calculate the surface charge density of a conducting plate moving at constant speed in a uniform magnetic Field [closed]
I have conducting plate moving at velocity $v = 6.28\cdot10^5\mathrm m/\mathrm s$ through a uniform magnetic Field of $B = 0.18\mathrm T$. How can I determine the surface charge density?
0
votes
0
answers
113
views
The mechanism behind the Lorentz force [duplicate]
It has been known for 130 years that a moving electron entering an external magnetic field is deflected (Lorentz force, Hall effects, synchrotrons). What I have never read is a description of how this ...
- 10.6k
1
vote
0
answers
93
views
Why doesn't the classical model of electrical conduction work with iron, cadmium and bismuth?
My textbook says this:
In most metals, the charge carriers are electrons and the charge - carrier density determined from Hall - effect measurements is in good agreement with calculated values for ...
- 3,340
0
votes
1
answer
527
views
Analogous to hall effect, does electric field applied perpendicular to the current direction through a semiconductor bar create magnetic field?
Hall effect says, when a magnetic field is applied perpendicular to current direction in a semiconductor bar, an electric field (and hence Hall voltage) will be created across the side which is ...
3
votes
1
answer
817
views
Longitudinal conductivity from density of states (DOS)
It is well-known that using the so-called Streda formula, the transversal conductivity $\sigma_{xy}$ and thus the Hall conductivity in a two-dimensional material is given as the derivative of the ...
- 117
0
votes
1
answer
88
views
Why is magneto-resistance not possible classically?
Someone recently asked me this question and I don't know why we can't talk about magnetoresistance in the classical picture. As we know that magnetoresistance is the tendency of a material (often ...
1
vote
0
answers
43
views
Computing a second harmonic resistance out of a wave-like resistance signal
I want to reproduce the results of a paper, in which they measure the Anharmonic Hall Effect (AHE) resistance $R_{AHE}^{2\omega}$. There are several protocols for measuring it experimentally, but I'm ...
- 181
0
votes
1
answer
104
views
Relationship between the magnetic dipole of the electron and the polarisation of its radiation
When passing through a magnetic field, electrons are deflected sideways. This is the basis of the Lorentz force and all Hall effects. If this is done on a larger scale in particle accelerators or, in ...
- 10.6k
2
votes
1
answer
156
views
How do protons and electrons separate across a conductor in the Hall Effect, if protons "don't move"?
I have a (probably very) basic understanding of electricity, how/why current flows, etc. from my ham technician's license. I often think of the water-in-a-hose analogy, how pressure (voltage?) causes ...
- 123
0
votes
0
answers
111
views
How to calculate the total charge separated by the Hall effect?
If a plate is undergoing the Hall Effect, how can we calculate the total charge $Q$ present on either side of the plate at the equilibrium state?
And how can we calculate the force that such a charge ...
1
vote
0
answers
51
views
Do I correctly understand the reason why the Hall resistivity in Quantum Hall Effect becomes larger as magnetic field increases?
I'm wondering whether I correctly understand the increase of the Hall resistivity rho_xy in Quantum Hall effect.
As you can see the graph,
As magnetic field becomes much larger, the quantization of ...
- 11
2
votes
1
answer
362
views
Why (intuitively) do more charge carriers result in a smaller Hall effect?
From the equation for the Hall effect:
$$\Delta V_H= \frac{I B}{n q t}$$
[Where $I$ is the current, $B$ the electric field magnitude, $n$ the density of charge carriers, $q$ the charge per charge ...
- 160
0
votes
1
answer
106
views
Why does Equilibrium produce voltage difference in Hall Effect?
This question is bothering me ever since I studied Hall effect. Am I probably missing out a point?
To elaborate the question: I understand that Lorentz force and electric force are equal and opposite ...
- 1
1
vote
0
answers
355
views
How to make sense of the side jump mechanism for anomalous Hall effect?
According to this paper, https://doi.org/10.1103/PhysRevB.2.4559, the electron (wave packet), moving along $x$ axis, undergoes a transverse shift $Δy$ after collision with spin-orbit coupling center. ...
- 81
1
vote
0
answers
18
views
Calibration of Hall Effect Measurement using Standard Reference Material (NIST)
I would like to calibrate a low-temperature Hall effect measurement using a Fe SRM.
Are there any standardized Hall measurements of SRM's available?
- 11